Process of making inking-rollers.



J. H.- HENNBSSEY. Y PROGESS 0F MAKING INKING ROLLBRS. APPLIGATION FILED 00115. y11:07-.

Patented Dec. 1, 1908.

UNTED srxrEs oEEIoE.

JEEoMEr H.- nENNEssEY, or wAsHISMGToMnIsTRIcT 0F COLUMBIA.

PRooEss or MAKING minne-Romans.

i Specification ofLetters Patent.

Patented Dec. 1, 190,8.

Application filed October 15, 1907. Serial No. 397,493.

cast layer of a composition of glue and glyc-` erin. In printing heavy forms it is necessary to supply a thick layer of ink to the distributer-plate or roller and to decrease the supply of ink for light forms. This result is commonly eEected by a series of adjusting screws acting on a flexible strip to vary the thickness of the layer of ink supplied to the rollers. A change from a heavy to a light form or the reverse requires a careful adjustment of each of these fountain-screws.

The present invention is a process of making an inking-roller having an elastic cast body with a helicalv ink-receiving surface. By providing a printing-press` with interchangeable ductor-rollers having helical surfaces of different area, the amount of ink delivered from the fountain to the distributer may be varied without adjusting the fountain-screws, by merely substituting a roller with a smaller surface when it is desired to change from a heavy to a light form. Thatl is, each of the ductor-rollers is supplied by the fountain-roller with an ink-layer of uniform thickness but the areaof this layer vai ries, depending on the receiving surface of the ductoreroller. The present invention is a process of making these rollers, by helically winding a core with a flexible Strip, placing the wound core in a tubular mold with the outer surface of the strip in contact with the mold-wall, casting the composition onto the mold of Fig. 1, the flexible strip having been removed; and Fig. 3 is a side elevation of a portion of a modified roller, the ink-receivin surface of which comprises right and le thand narrow helices.

In order to cast the roller, a cylindrical metal core 1 is helically wound with a flexible strip 2 which may be of leather, the ends of this strip being secured for example by pins 3 passing transversely through holes in, these ends and through corresponding transverse holes in the upper and lower ends of the core. The wound core is then inserted in the tubular mold 4, with the surfaces of the strip substantially in contact with the inner wall of the mold. The mold is then placed in position for casting, its lower journal 5 being supported in a central seat in the mold-base 6 and its upper journal 7 being centered by a removable spider 8. The composition, for example a mixture of glue and glycerin, is then forced into the base of the mold through the pipe 9 and fills the spaces between the wound strip. When the composition solidifles, the wound core and casting are removed from the mold, the strip is unwound and the ends of the casting are trimmed off, the resulting elastic cast body 10 having the shape shown in Fig. 2, that is having a relatively narrow helical ink-receiving surface. v

'The inking-roller shown in Fig. 3 has a cast elastic body 10', with an ink-receiving surface 11 comprising two narrow right and left-hand helices, meeting at the middle of the roller. This roller is made by the same process as that shown in Fig. 2, two flexible strips of suitable form to cast the groove between the helices being wound on the core, in a right and left-hand direction respectively, from the middle'to the ends of the core.

. I claim:

1. The process of making an inking-r'oller, which consists in helically-winding a core with a flexible strip, placing the wound core in a tubular mold with the outer surface of the `strip substantially in contact with the mold-wall,` casting roller-composition onto the core and into the spaces between the strip, removing the wound core and casting, and unwinding the strip.

2. The process of making an inking-roller, which consists in helically winding a core with a flexible strip, placing the wound core in a tubular mold With the oter surface of In testimony whereof, I aHX my signa the strip substantially in Contact with the mold-Wall, forcing roller-composition upward into the mold and causing it to fill 5 the spaces between the strip, removing the Wound core and casting, and unwndng the strip.

ture in presence of two witnesses..

JEROME H. HEUNESSIQY.

Vtnesses DAVID A. SMITH, J. PIERPONT COLLINS. 

